example.rb

class PostRepo
  extend Chassis::Repo::Delegation
  
  class << self
    def backend
      PostStore.instance
    end
  end
end

class StatRepo
  extend Chassis::Repo::Delegation

  class << self
    def backend
      StatStore.instance
    end
  end
end

class StatStore < Chassis::BaseRepo
  include Singleton
end

class PostStore < Chassis::BaseRepo
  include Singleton
end

PostStore.instance.use :memory
StatStore.instance.use :memory

# Anything w/o backend redefined will go here
Chassis.repo.use :memory

class RedisStatStore
  # blah blah
end

class NoegraphyPostStore
  # blah blah
end

PostStore.instance.register :neography, NeographyPostStore.new
StatStore.instance.register :redis, RedisStatsStore.new

# then you can use :redis, or :neography as appriorate